If you'll pardon the thread crash, OTW's post gave me an idea.
I wish I had a specific slogan, but given the previous post, about cultural sensitivity in this day and age, it may be better to go straight to the source on Hawaiian slogans, sayings, etc.
I went to a large enough university where there was a Hawaiian/Polynesian student cultural organization on campus. If there is one in your area, perhaps they could help you out with a slogan or theme that is not only appropriate, but a true celebration of the culture, without risking being offensive in some way.
I'm sorry I don't have more to offer on this one, but I hope the idea helps.
Adrienne (PNAM-2003)
